diff --git a/Documentation/kbuild/kconfig.txt b/Documentation/kbuild/kconfig.txt
index 9d5f2a90dca9..a09f1a6a830c 100644
--- a/Documentation/kbuild/kconfig.txt
+++ b/Documentation/kbuild/kconfig.txt
@@ -53,15 +53,15 @@ KCONFIG_ALLCONFIG
 --------------------------------------------------
 (partially based on lkml email from/by Rob Landley, re: miniconfig)
 --------------------------------------------------
-The allyesconfig/allmodconfig/allnoconfig/randconfig variants can
-also use the environment variable KCONFIG_ALLCONFIG as a flag or a
-filename that contains config symbols that the user requires to be
-set to a specific value.  If KCONFIG_ALLCONFIG is used without a
-filename, "make *config" checks for a file named
-"all{yes/mod/no/def/random}.config" (corresponding to the *config command
-that was used) for symbol values that are to be forced.  If this file
-is not found, it checks for a file named "all.config" to contain forced
-values.
+The allyesconfig/allmodconfig/allnoconfig/randconfig variants can also
+use the environment variable KCONFIG_ALLCONFIG as a flag or a filename
+that contains config symbols that the user requires to be set to a
+specific value.  If KCONFIG_ALLCONFIG is used without a filename where
+KCONFIG_ALLCONFIG == "" or KCONFIG_ALLCONFIG == "1", "make *config"
+checks for a file named "all{yes/mod/no/def/random}.config"
+(corresponding to the *config command that was used) for symbol values
+that are to be forced.  If this file is not found, it checks for a
+file named "all.config" to contain forced values.
 
 This enables you to create "miniature" config (miniconfig) or custom
 config files containing just the config symbols that you are interested
diff --git a/scripts/config b/scripts/config
index a7c7c4b8e957..ed6653ef9702 100755
--- a/scripts/config
+++ b/scripts/config
@@ -107,7 +107,8 @@ while [ "$1" != "" ] ; do
 		;;
 
 	--set-str)
-		set_var "CONFIG_$ARG" "CONFIG_$ARG=\"$1\""
+		# sed swallows one level of escaping, so we need double-escaping
+		set_var "CONFIG_$ARG" "CONFIG_$ARG=\"${1//\"/\\\\\"}\""
 		shift
 		;;
 
@@ -124,9 +125,11 @@ while [ "$1" != "" ] ; do
 			if [ $? != 0 ] ; then
 				echo undef
 			else
-				V="${V/CONFIG_$ARG=/}"
-				V="${V/\"/}"
-				echo "$V"
+				V="${V/#CONFIG_$ARG=/}"
+				V="${V/#\"/}"
+				V="${V/%\"/}"
+				V="${V/\\\"/\"}"
+				echo "${V}"
 			fi
 		fi
 		;;
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index f208f900ed3a..0dc4a2c779b1 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -574,8 +574,15 @@ int main(int ac, char **av)
 	case alldefconfig:
 	case randconfig:
 		name = getenv("KCONFIG_ALLCONFIG");
-		if (name && !stat(name, &tmpstat)) {
-			conf_read_simple(name, S_DEF_USER);
+		if (!name)
+			break;
+		if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
+			if (conf_read_simple(name, S_DEF_USER)) {
+				fprintf(stderr,
+					_("*** Can't read seed configuration \"%s\"!\n"),
+					name);
+				exit(1);
+			}
 			break;
 		}
 		switch (input_mode) {
@@ -586,10 +593,13 @@ int main(int ac, char **av)
 		case randconfig:	name = "allrandom.config"; break;
 		default: break;
 		}
-		if (!stat(name, &tmpstat))
-			conf_read_simple(name, S_DEF_USER);
-		else if (!stat("all.config", &tmpstat))
-			conf_read_simple("all.config", S_DEF_USER);
+		if (conf_read_simple(name, S_DEF_USER) &&
+		    conf_read_simple("all.config", S_DEF_USER)) {
+			fprintf(stderr,
+				_("*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n"),
+				name);
+			exit(1);
+		}
 		break;
 	default:
 		break;